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All Journal Jurnal Pengajaran MIPA Jurnal Pengajaran Matematika dan Ilmu Pengetahuan Alam Orbital: Jurnal Pendidikan Kimia Indonesian Journal of Chemistry Communications in Science and Technology Jurnal Kartika Kimia Journal of Tropical Chemistry Research and Education Asean Journal of Science and Engineering (AJSE) Indonesian Journal of Multidiciplinary Research (IJoMR) Journal of Educational Sciences Journal of Fibers and Polymer Composites Jurnal Pengabdian Isola Jurnal Riset dan Praktik Pendidikan Kimia Indonesian Scholar Journal of Nursing and Midwifery Science
Fitri Khoerunnisa
Universitas Pendidikan Indonesia
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KAJIAN ADSORPSI Ag(S2O3)23- DALAM LIMBAH FOTOGRAFI PADA ADSORBEN KITIN DAN ASAM HUMAT TERIMOBILISASI PADA KITIN Khoerunnisa, Fitri; Santosa, Sri Juari; Kunarti, Eko Sri
Jurnal Pengajaran Matematika dan Ilmu Pengetahuan Alam Vol 9, No 2 (2007): Jurnal Pengajaran MIPA
Publisher : Faculty of Mathematics and Science Education, Universitas Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18269/jpmipa.v9i2.327

Abstract

This work was started with isolation of humic acid from peat soil and chitin from crab shell, immobilization of humic acid on chitin, and characterization of adsorbents of C and HAC. Optimum condition was studied by interacting the adsorbents with Ag(S2O3)23- in a synthetic solution on various  of pH from 2 to 10. Adsorption rate was studied by interacting the adsorbent with Ag(S2O3)23- in the synthetic solution on various time from 2 to 120 minutes. The determination of the energy and the capacity of adsorption were studied by interacting the adsorbent with Ag(S2O3)23- on various initial concentration from 2 to 75 ppm. Moreover, the mechanism of adsorption was studied by applying a sequential desorption using H2O, Na2EDTA 0.1 M, KSCN 0.5 M, and KOH 1 M. The adsorption of Ag(S2O3)23- in photography wastewater on C and on HAC were studied at the same condition as obtained for the synthetic solution. The result showed that pH 2 was the optimum adsorption condition for Ag(S2O3)23- in the synthetic solution on both C and HAC adsorbents. Ag(S2O3)23- in the synthetic solution was chemically adsorbed on C and on HAC, involving energy adsorption of 22.74–23.30 kJ/mole, respectively. Adsorption of Ag(S2O3)23- on C was faster than that on HAC with the rate constants for adsorbent C and HAC were 73 x 10-4 and 46 x 10-4 minute-1, respectively. Adsorption capacity of Ag(S2O3)23- on C and on HAC were 2.107 x 10-4 and 1.818 x 10-4 mole/g, respectively. The amount of Ag(S2O3)23- in photography wastewater that was adsorbed on C and on HAC were 13.52 and 12.47 mg/L, respectively. The hydrogen bonding and ion exchange were the dominant mechanism of adsorption.Key words: Ag(S2O3)23-, adsorption, chitin, immobilization, humic acid.
SINTESIS KALIKS[4]RESORSINARENA DARI MINYAK KAYUMANIS DAN PENGGUNAANNYA UNTUK EKSTRAKSI FASA PADAT LOGAM BERAT HG(II) DAN PB(II) Sardjono, Ratnaningsih E.; Dwiyanti, Gebi; Aisyah, Siti; Khoerunnisa, Fitri
Jurnal Pengajaran Matematika dan Ilmu Pengetahuan Alam Vol 12, No 1 (2008): Jurnal Pengajaran MIPA
Publisher : Faculty of Mathematics and Science Education, Universitas Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18269/jpmipa.v12i1.318

Abstract

Sintesis C-sinamal kaliks[4]resorsinarena (CSKR) dari minyak kayumanis dan penggunanannya untuk ekstraksi fasa padat logam berat Pb(II) dan Hg(II) telah dilakukan. CSKR diperoleh sebanyak 75% sebagai produk reaksi resorsinol dan sinamaldehida pada 77oC selama 24 jam. Isolasi sinamaldehida dari minyak kayumanis melalui metode bisulfit menghasilkan sinamaldehida sebanyak 79% dengan kemurnian 99,5%. Ekstraksi fasa padat Pb(II) dan Hg(II) oleh CSKR dilakukan dalam sistem batch pada berbagai pH, waktu interaksi, dan konsentrasi logam. Ekstraksi fasa padat Pb(II) berlangsung optimum pada pH 4, waktu interaksi 180 menit, dan konsentrasi awal 6,6 mg/L, mengikuti model kinetika pseudo orde dua, mengikuti model isoterm Langmuir, serta memberikan kapasitas ekstraksi sebesar 1,986 mol/g atau 37,2%. Sementara itu, ekstraksi fasa padat Hg(II) berlangsung optimum pada pH 5, waktu interaksi 180 menit, dan konsentrasi awal 0,36 mg/L, mengikuti model kinetika pseudo orde dua, mengikuti model isoterm Freundlich, serta memberikan kapasitas ekstraksi sebesar 0,71 mol/g atau 79,1%.Kata kunci :  Ekstraksi Fasa Padat, Kaliks[4]resorsinarena, Minyak Kayumanis, Hg(II), Pb(II)  
SINTESIS KALIKS[4]RESORSINARENA DARI MINYAK KAYUMANIS DAN PENGGUNAANNYA UNTUK EKSTRAKSI FASA PADAT LOGAM BERAT HG(II) DAN PB(II) Sardjono, Ratnaningsih E.; Dwiyanti, Gebi; Aisyah, Siti; Khoerunnisa, Fitri
Jurnal Pengajaran MIPA Vol 12, No 2 (2008): JPMIPA: Volume 12, Issue 2, 2008
Publisher : Faculty of Mathematics and Science Education, Universitas Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18269/jpmipa.v12i2.35776

Abstract

Sintesis C-sinamal kaliks[4]resorsinarena (CSKR) dari minyak kayumanis dan penggunanannya untuk ekstraksi fasa padat logam berat Pb(II) dan Hg(II) telah dilakukan. CSKR diperoleh sebanyak 75% sebagai produk reaksi resorsinol dan sinamaldehida pada 77oC selama 24 jam. Isolasi sinamaldehida dari minyak kayumanis melalui metode bisulfit menghasilkan sinamaldehida sebanyak 79% dengan kemurnian 99,5%. Ekstraksi fasa padat Pb(II) dan Hg(II) oleh CSKR dilakukan dalam sistem batch pada berbagai pH, waktu interaksi, dan konsentrasi logam. Ekstraksi fasa padat Pb(II) berlangsung optimum pada pH 4, waktu interaksi 180 menit, dan konsentrasi awal 6,6 mg/L, mengikuti model kinetika pseudo orde dua, mengikuti model isoterm Langmuir, serta memberikan kapasitas ekstraksi sebesar 1,986 mol/g atau 37,2%. Sementara itu, ekstraksi fasa padat Hg(II) berlangsung optimum pada pH 5, waktu interaksi 180 menit, dan konsentrasi awal 0,36 mg/L, mengikuti model kinetika pseudo orde dua, mengikuti model isoterm Freundlich, serta memberikan kapasitas ekstraksi sebesar 0,71 mol/g atau 79,1%.
KAJIAN ADSORPSI Ag(S2O3)2 3- DALAM LIMBAH FOTOGRAFI PADA ADSORBEN KITIN DAN ASAM HUMAT TERIMOBILISASI PADA KITIN Khoerunnisa, Fitri; Santosa, Sri Juari; Kunarti, Eko Sri
Jurnal Pengajaran MIPA Vol 9, No 2 (2007): JPMIPA: Volume 9, Issue 2, 2007
Publisher : Faculty of Mathematics and Science Education, Universitas Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18269/jpmipa.v9i2.35754

Abstract

This work was started with isolation of humic acid from peat soil and chitin from crab shell, immobilization of humic acid on chitin, and characterization of adsorbents of C and HAC. Optimum condition was studied by interacting the adsorbents with Ag(S2O3)2 3- in a synthetic solution on various of pH from 2 to 10. Adsorption rate was studied by interacting the adsorbent with Ag(S2O3)2 3- in the synthetic solution on various time from 2 to 120 minutes. The determination of the energy and the capacity of adsorption were studied by interacting the adsorbent with Ag(S2O3)2 3- on various initial concentration from 2 to 75 ppm. Moreover, the mechanism of adsorption was studied by applying a sequential desorption using H2O, Na2EDTA 0.1 M, KSCN 0.5 M, and KOH 1 M. The adsorption of Ag(S2O3)2 3- in photography wastewater on C and on HAC were studied at the same condition as obtained for the synthetic solution. The result showed that pH 2 was the optimum adsorption condition for Ag(S2O3)2 3- in the synthetic solution on both C and HAC adsorbents. Ag(S2O3)2 3- in the synthetic solution was chemically adsorbed on C and on HAC, involving energy adsorption of 22.74–23.30 kJ/mole, respectively. Adsorption of Ag(S2O3)2 3- on C was faster than that on HAC with the rate constants for adsorbent C and HAC were 73 x 10-4 and 46 x 10-4 minute-1 , respectively. Adsorption capacity of Ag(S2O3)2 3- on C and on HAC were 2.107 x 10-4 and 1.818 x 10-4 mole/g, respectively. The amount of Ag(S2O3)2 3- in photography wastewater that was adsorbed on C and on HAC were 13.52 and 12.47 mg/L, respectively. The hydrogen bonding and ion exchange were the dominant mechanism of adsorption.
BIODEGRADASI SIFAT TOKSIK LOGAM BERAT KROM DALAM LIMBAH CAIR INDUSTRI Nahadi, Nahadi; Hernani, Hernani; Khoerunnisa, Fitri
Jurnal Pengajaran MIPA Vol 6, No 2 (2005): JPMIPA: Volume 6, Issue 2, 2005
Publisher : Faculty of Mathematics and Science Education, Universitas Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18269/jpmipa.v6i2.34995

Abstract

Telah dilakukan penelitian degradasi sifat toksik logam berat krom oleh bakteri melalui rekasi enzimatik yang mengubah krom(VI) toksik menjadi krom(III) yang kurang toksik. Penelitian dilakukan dengan memvariasikan pengaruh beberapa parameter terhadap reaksi enzimatik ini yaitu; jumlah bakteri, tingkat keasaman dan konsentrasi krom(VI).Untuk menentukan konsentrasi krom(VI) yang tereduksi menjadi krom(III) digunakan teknik spektrofotometri UV-Vis. Jumlah krom(VI) yang tereduksi menjadi krom(III) ditentukan dengan menghitung selisih antara jumlah krom(VI) sebelum dan sesudah proses transformasi.Hasil analisis menunjukkan bahwa efektivitas transformasi krom(VI) menjadi krom(III) dipengaruhi oleh parameter-parameter di atas. Transformasi krom(VI) menjadi krom(III)  sangat dipengaruhi oleh pH larutan. Kondisi keasaman optimum untuk terjadinya transformasi krom(VI) menjadi krom(III) adalah pada pH = 7.  Proses transformasi ini  meningkat secara linear sebagai fungsi konsentrasi awal, dengan konsentrasi maksimum 30 ppm. Transformasi ini juga berlangsung efektif pada jumlah bakteri satu ose. Tingkat transformasi pada kondisi optimum mencapai 88,4%.
Geothermal: From Education to a New Solution for Renewable Energy Fauziah, Naila Raima; Maoludin, Surya Alfin; Ramadhan, Wildan Septi; Wafi, Wulanda; Khoerunnisa, Fitri; Winarno, Nanang
Indonesian Journal of Multidiciplinary Research Vol 1, No 1 (2021): IJOMR: VOLUME 1, ISSUE 1, 2021
Publisher : Universitas Pendidikan Indonesia (UPI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1385.344 KB) | DOI: 10.17509/ijomr.v1i1.33785

Abstract

Fossil energy is still the main contributor in Indonesia. In fact, based on a study it is stated that fossil fuels will only last 50-70 years. For this reason, it is necessary to increase the role of geothermal energy as renewable energy. Geothermal energy is very good if it is developed into a new and renewable energy source because it has a good impact on the environment. Geothermal energy also does not damage the local conditions such as mining activities so that biodiversity is preserved. Then, the operation period of the Geothermal Power Generation (known as PLTP) can be more than 30 years and does not require fuel. Geothermal energy is environmentally friendly, and its potential impact on pollution is minimal. Thus, geothermal energy is the right solution to overcome dependence on fossil energy that is not renewable and is expected to run out in the near future.
Eco Cooler for Cooler House without Electricity for Educational Purposes Antonio, Alvito; Hasanah, Maulidah; Damayanti, Novita; Devina, Oryza Aprilia; Khoerunnisa, Fitri; Winarno, Nanang
Indonesian Journal of Multidiciplinary Research Vol 1, No 1 (2021): IJOMR: VOLUME 1, ISSUE 1, 2021
Publisher : Universitas Pendidikan Indonesia (UPI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1436.007 KB) | DOI: 10.17509/ijomr.v1i1.33775

Abstract

The earth's temperature from 1981 to February 2021 has relatively increased. The increase in temperature on earth has made many people choose to use air conditioning so that the temperature in their homes is not too cold. The energy demand from air conditioning worldwide will be three times as much by 2050. Bangladesh has created a system called the Eco-Cooler as an alternative to lowering room temperature without using large electrical energy so as to save energy and costs. The eco-cooler can reduce temperatures from 1-3˚C in a room with a size of 4.2 × 4.2 × 3.3 m3 using an Eco-cooler with a bottle diameter of 6 cm and a board area of 48 × 48 cm2. This can be a good educational point for being applied in Indonesia. The advantage of using the Eco-Cooler is that it is easy to maintain, easy to use, the air is more humid, and it saves energy.
The Efficient Implementation of Hybrid Power Plants in Indonesia Perdiansyah, Farhan; Fitriana, Eka Tiara Nur; Aziema, Nur; Maharani, Permata Putri; Khoerunnisa, Fitri; Winarno, Nanang
Indonesian Journal of Multidiciplinary Research Vol 1, No 1 (2021): IJOMR: VOLUME 1, ISSUE 1, 2021
Publisher : Universitas Pendidikan Indonesia (UPI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1339.42 KB) | DOI: 10.17509/ijomr.v1i1.33772

Abstract

The energy crisis is a serious issue that all countries around the world are dealing with, particularly the energy sources used to generate electricity. There are numerous alternative energy sources available in nature, such as solar energy, wind energy, and so on. Wind and solar energy as hybrid energy sources are thought to be promising in electric generation technology. Hybrid Power Plants can also be used to address the issue of limited electrical energy supply in Indonesia's remote areas. The purpose of this study is to describe the effectiveness of the hybrid power plants implementation in Indonesia. The study was conducted using the narrative literature review method. It can be inferred that the purpose of developing this hybrid technology, among others, is to obtain more efficient electrical energy generation by combining the advantages of two or more types of power generation systems that work in an integrated manner as a compact system. The produced electric energy can be stored in the battery. In terms of use, the produced direct current (DC) is converted into alternating current (AC) using the inverter system prior to distribution to consumers. Therefore, this hybrid power plant is suitable to be implemented in Indonesia.
A Green Synthesis of a Novel Calix[4]Resorcinarene from 7-Hydroxycitronellal Using Microwave Irradiation Ratnaningsih Eko Sardjono; Iqbal Musthapa; Iis Rosliana; Fitri Khoerunnisa; Galuh Yuliani
Indonesian Journal of Chemistry Vol 18, No 1 (2018)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (891.42 KB) | DOI: 10.22146/ijc.25466

Abstract

A new versatile macromolecule cyclic C-3,7-dimethyl-7-hydroxycalix[4]resorcinarene (CDHHK4R) has been synthesized from a fragrance agent, 7-hydroxycitronellal, via microwave irradiation. The reaction utilized a domestic microwave oven at various irradiation time and power to yield an optimum condition. As a comparison, the conventional heating method was also employed for the synthesis of the same calix[4]resorcinarene. Compared to the conventional method, microwave-assisted reaction effectively reduced the reaction time, the amount of energy consumption and the waste production. It is found that the synthesis of CDHHK4R by microwave irradiation yielded 77.55% of product, higher than by conventional heating which was only 62.17%.
Electrically Conductive Nanocomposites Polymer of Poly(Vinyl Alcohol)/Glutaraldehyde/Multiwalled Carbon Nanotubes: Preparation and Characterization Fitri Khoerunnisa; Hendrawan Hendrawan; Yaya Sonjaya; Rizki Deli Hasanah
Indonesian Journal of Chemistry Vol 18, No 3 (2018)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (356.476 KB) | DOI: 10.22146/ijc.26620

Abstract

Electrically conductive nanocomposites polymer of poly(vinyl alcohol)/PVA, glutaraldehyde (GA) and multiwalled carbon nanotubes (MWCNT) has been successfully synthesized. The polymer nanocomposites were prepared by mixing PVA, GA (crosslinker), and MWCNT dispersion with an aid of ultrasonic homogenizer at 50 °C. The content of MWCNT, in particular, was varied in order to determine the effect of MWCNT on electrical conductivity of polymer composites. The polymer mixture was casted into a disc to obtain thin film. The electrical conductivity, surface morphology, and mechanical properties of the composites film were investigated by means of four probes method, FTIR spectroscopy, X-ray diffraction, SEM, AFM, and tensile strength measurement, respectively. It was found that the optimum composition of PVA (10%): GA (1%): MWCNT (1%) was 20:20:3 in volume ratio. The addition of MWCNT induced the electrically conductive network on polymer matrix where the electrical conductivity of nanocomposites film significantly increased up to 8.28 x 10-2 S/sq due to reduction of the contact resistance between conductive filler. Additionally, the mechanical strength of nanocomposites polymer were significantly increased as a result of MWCNT addition. Modification of morphological structure of composite film as indicated by FTIR spectra, X-ray diffraction patterns, SEM, and AFM images verified the effective MWCNT filler network in the polymer matrix.
Co-Authors Ahmad Aminudin Ali Kusrijadi Anna Permanasari Annifah, Riri Uswatun Antonio, Alvito Arrozi , Ubed Sonai Fahruddin Asep Kadarohman Ashfiya, Putri Sayyida Astuti, Wijayanti Dwi Aziema, Nur Aziz, Hafiz Aji Boon Seng Ooi Budiman Anwar Da, Oh Wen Devi Pratiwi Sudrajat Devina, Oryza Aprilia Dwi, Sadina Sahitya Eka Tiara Nur Fitriana Eko Sri Kunarti Eli Hendrik Sanjaya Eneng Saidatus Syadiah Farhan Perdiansyah Fauziah, Naila Raima Fitriana, Eka Tiara Nur Florentina Maria Titin Supriyanti Galuh Yuliani Gebi Dwiyanti Girsang, Gabriela Chelvina Santiuly Gun Gun Gumilar Hasanah, Maulidah Hendrawan Hendrawan Hendrawan Hendrawan HERNANI - Hokcu Suhanda Iasha, Yurin Karunia Apsha Albaina Iasya, Yurin Karunia Apsha Albaina Ida Hamidah Iis Rosliana Iqbal Musthapa Irnanda, Istifhamy Jayawarsa, A.A. Ketut Maharani, Brigitta Stacia Maharani, Permata Putri Mahmudah, Eneng Maoludin, Surya Alfin Muhamad Nurul Hana Murni Handayani Nahadi Nanang Winarno Novita Damayanti Nur Aziema Nuraini, Vidia Afina Nurhayati, Mita Perdiansyah, Farhan Permata Putri Maharani Purwanti purwanti Putri, Restiani Alia Ramadhan, Wildan Septi Ratnaningsih E. Sardjono Ratnaningsih Eko S. Rizke Pratiwi Ismania Puteri Rizki Deli Hasanah Rosi Oktiani Santy Shafira Setiawati Silvia Widiyanti Siti Aisyah Siti Supriyanti Soja Siti Fatimah Soja Siti Fatimah Sri Juari Santosa Sri Mulyani Sri Mulyani Sriyati , Siti Supriyanti, Siti Syifa Ayugea Salsabila Tika Eka Fitri Wafi, Wulanda Widiyanti, Silvia Widyaningsih, Mia Wiji Wiji Yaya Sonjaya Yessi Permana